Boylesports have been announced as the new sponsors of the Irish 1000 and 2000 Guineas until at least 2006.
The deal with the Irish bookmakers will mean the meeting at the Curragh on May 22 and 23 will now be known as the Boylesports Irish Guineas Festival, and will include seven support races over the two days.
Boylesports are also offering any rider who can with both Classics 10,000 euros, to be donated to the Injured Jockeys' Fund.
The firm will also donate a minimum of 5,000 euros to the Fund to mark the beginning of their sponsorship.